Question

For the following arithmetic progressions write the first term $a$ and the common difference $d$:
$-1.1,-3.1,-5.1,-7.1,.....$

Answer 1

Given Arithmetic progression (A.P) is

$-1.1,-3.1,-5.1,-7.1,........$

Hence the first term of the A.P is given by

$a_1=-1.1$

And the common difference of an A.P is given by the difference of two successive terms .

$(i.e.,d=a_{n+1}-a_n)$

By putting n=1 in above expression we get

$d=a_2-a_1$

$put{a}_1=-1.1and{a}_2=-3.1$

$d=(-3.1)-(-1.1)$

$d=(-3.1+1.1)$

$d=-2.0$